I'm running a 2x9 setup on one of my bikes. RF Evolve crankset (32/44) with the granny ring removed and a 11/32 cassette. Had to run a Third Eye Chain Watcher cuz the chain would occasionally drop at inopportune times. Works well and provides all the gear ratios I need - I don't ride in really hilly/mountainous trails so the 22t granny isn't needed.
Your only other concern would be to find a 2x9 shifter. I'm using a Sachs/Ritchey front twist shifter because it proveds trimming of the front derailleur and I picked it up on the cheap from Nashbar. Check em, maybe they still have em.